     exec_yankdup [:exec :integer]
     float_add [:float]
     float_cos [:float]
+    float_dec [:float]
     float_div [:float]
     float_dup [:float]
     float_empty [:boolean :float]

    string_take [:string :integer]
    string_yank [:string :integer]
    string_yankdup [:string :integer]
    zip_append_child_fromcode [:zip :code]
    zip_append_child_fromexec [:zip :exec]
    zip_branch? [:zip :boolean]

    float_fromstring [:string :float]
    float_gt [:float :boolean]
    float_gte [:float :boolean]
    float_inc [:float]
    float_lt [:float :boolean]
    float_lte [:float :boolean]
    float_max [:float]
